Where would I buy a replacement tine? you can see in the 1st and 2nd picture that the tines are shaped like a question mark on it's side...I don't know the term to describe the shape or type to search.

I stopped at a place south of burlington, vt (lots of old tractors and equipment) and was in the midst of describing this cultivator and we were standing in front of the exact one like mine...but it had fast hitch prongs...3". He didn't know if it was a 200 or a 263. But definitely IH...it had the "RI" in the castings.